sjero.net Git - linphone/blob - coreapi/misc.c

   1
   2 /*
   3 linphone
   4 Copyright (C) 2000  Simon MORLAT (simon.morlat@linphone.org)
   5
   6 This program is free software; you can redistribute it and/or
   7 modify it under the terms of the GNU General Public License
   8 as published by the Free Software Foundation; either version 2
   9 of the License, or (at your option) any later version.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with this program; if not, write to the Free Software
  18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  19 */
  20
  21 #include "private.h"
  22 #include "lpconfig.h"
  23 #include "mediastreamer2/mediastream.h"
  24 #include <stdlib.h>
  25 #include <stdio.h>
  26 #ifdef HAVE_SIGHANDLER_T
  27 #include <signal.h>
  28 #endif /*HAVE_SIGHANDLER_T*/
  29
  30 #include <string.h>
  31 #if !defined(_WIN32_WCE)
  32 #include <errno.h>
  33 #include <sys/types.h>
  34 #include <sys/stat.h>
  35 #include <unistd.h>
  36 #include <fcntl.h>
  37 #endif /*_WIN32_WCE*/
  38
  39 #undef snprintf
  40 #include <ortp/stun.h>
  41
  42 #ifdef HAVE_GETIFADDRS
  43 #include <net/if.h>
  44 #include <ifaddrs.h>
  45 #endif
  46
  47
  48 #if !defined(WIN32)
  49
  50 static char lock_name[80];
  51 static char lock_set=0;
  52 /* put a lock file in /tmp. this is called when linphone runs as a daemon*/
  53 int set_lock_file()
  54 {
  55         FILE *lockfile;
  56
  57         snprintf(lock_name,80,"/tmp/linphone.%i",getuid());
  58         lockfile=fopen(lock_name,"w");
  59         if (lockfile==NULL)
  60         {
  61                 printf("Failed to create lock file.\n");
  62                 return(-1);
  63         }
  64         fprintf(lockfile,"%i",getpid());
  65         fclose(lockfile);
  66         lock_set=1;
  67         return(0);
  68 }
  69
  70 /* looks if there is a lock file. If presents return its content (the pid of the already running linphone), if not found, returns -1*/
  71 int get_lock_file()
  72 {
  73         int pid;
  74         FILE *lockfile;
  75
  76         snprintf(lock_name,80,"/tmp/linphone.%i",getuid());
  77         lockfile=fopen(lock_name,"r");
  78         if (lockfile==NULL)
  79                 return(-1);
  80         if (fscanf(lockfile,"%i",&pid)!=1){
  81                 ms_warning("Could not read pid in lock file.");
  82                 fclose(lockfile);
  83                 return -1;
  84         }
  85         fclose(lockfile);
  86         return pid;
  87 }
  88
  89 /* remove the lock file if it was set*/
  90 int remove_lock_file()
  91 {
  92         int err=0;
  93         if (lock_set)
  94         {
  95                 err=unlink(lock_name);
  96                 lock_set=0;
  97         }
  98         return(err);
  99 }
 100
 101 #endif
 102
 103 char *int2str(int number)
 104 {
 105         char *numstr=ms_malloc(10);
 106         snprintf(numstr,10,"%i",number);
 107         return numstr;
 108 }
 109
 110 void check_sound_device(LinphoneCore *lc)
 111 {
 112 #ifdef _linux
 113         int fd=0;
 114         int len;
 115         int a;
 116         char *file=NULL;
 117         char *i810_audio=NULL;
 118         char *snd_pcm_oss=NULL;
 119         char *snd_mixer_oss=NULL;
 120         char *snd_pcm=NULL;
 121         fd=open("/proc/modules",O_RDONLY);
 122
 123         if (fd>0){
 124                 /* read the entire /proc/modules file and check if sound conf seems correct */
 125                 /*a=fstat(fd,&statbuf);
 126                 if (a<0) ms_warning("Can't stat /proc/modules:%s.",strerror(errno));
 127                 len=statbuf.st_size;
 128                 if (len==0) ms_warning("/proc/modules has zero size!");
 129                 */
 130                 /***** fstat does not work on /proc/modules for unknown reason *****/
 131                 len=6000;
 132                 file=ms_malloc(len+1);
 133                 a=read(fd,file,len);
 134                 if (a<len) file=ms_realloc(file,a+1);
 135                 file[a]='\0';
 136                 i810_audio=strstr(file,"i810_audio");
 137                 if (i810_audio!=NULL){
 138                         /* I'm sorry i put this warning in comments because
 139                          * i don't use yet the right driver !! */
 140 /*                      lc->vtable.display_warning(lc,_("You are currently using the i810_audio driver.\nThis driver is buggy and so does not work with Linphone.\nWe suggest that you replace it by its equivalent ALSA driver,\neither with packages from your distribution, or by downloading\nALSA drivers at http://www.alsa-project.org."));*/
 141                         goto end;
 142                 }
 143                 snd_pcm=strstr(file,"snd-pcm");
 144                 if (snd_pcm!=NULL){
 145                         snd_pcm_oss=strstr(file,"snd-pcm-oss");
 146                         snd_mixer_oss=strstr(file,"snd-mixer-oss");
 147                         if (snd_pcm_oss==NULL){
 148                                 lc->vtable.display_warning(lc,_("Your computer appears to be using ALSA sound drivers.\nThis is the best choice. However the pcm oss emulation module\nis missing and linphone needs it. Please execute\n'modprobe snd-pcm-oss' as root to load it."));
 149                         }
 150                         if (snd_mixer_oss==NULL){
 151                                 lc->vtable.display_warning(lc,_("Your computer appears to be using ALSA sound drivers.\nThis is the best choice. However the mixer oss emulation module\nis missing and linphone needs it. Please execute\n 'modprobe snd-mixer-oss' as root to load it."));
 152                         }
 153                 }
 154         }else {
 155
 156                 ms_warning("Could not open /proc/modules.");
 157         }
 158         /* now check general volume. Some user forget to rise it and then complain that linphone is
 159         not working */
 160         /* but some other users complain that linphone should not change levels...
 161         if (lc->sound_conf.sndcard!=NULL){
 162                 a=snd_card_get_level(lc->sound_conf.sndcard,SND_CARD_LEVEL_GENERAL);
 163                 if (a<50){
 164                         ms_warning("General level is quite low (%i). Linphone rises it up for you.",a);
 165                         snd_card_set_level(lc->sound_conf.sndcard,SND_CARD_LEVEL_GENERAL,80);
 166                 }
 167         }
 168         */
 169         end:
 170         if (file!=NULL) ms_free(file);
 171         if (fd>0) close(fd);
 172 #endif
 173 }
 174
 175 #define UDP_HDR_SZ 8
 176 #define RTP_HDR_SZ 12
 177 #define IP4_HDR_SZ 20   /*20 is the minimum, but there may be some options*/
 178
 179 static void payload_type_set_enable(PayloadType *pt,int value)
 180 {
 181         if ((value)!=0) payload_type_set_flag(pt,PAYLOAD_TYPE_ENABLED); \
 182         else payload_type_unset_flag(pt,PAYLOAD_TYPE_ENABLED);
 183 }
 184
 185 static bool_t payload_type_enabled(const PayloadType *pt) {
 186         return (((pt)->flags & PAYLOAD_TYPE_ENABLED)!=0);
 187 }
 188
 189 bool_t linphone_core_payload_type_enabled(LinphoneCore *lc, const PayloadType *pt){
 190         if (ms_list_find(lc->codecs_conf.audio_codecs, (PayloadType*) pt) || ms_list_find(lc->codecs_conf.video_codecs, (PayloadType*)pt)){
 191                 return payload_type_enabled(pt);
 192         }
 193         ms_error("Getting enablement status of codec not in audio or video list of PayloadType !");
 194         return FALSE;
 195 }
 196
 197 int linphone_core_enable_payload_type(LinphoneCore *lc, PayloadType *pt, bool_t enabled){
 198         if (ms_list_find(lc->codecs_conf.audio_codecs,pt) || ms_list_find(lc->codecs_conf.video_codecs,pt)){
 199                 payload_type_set_enable(pt,enabled);
 200                 _linphone_core_codec_config_write(lc);
 201                 return 0;
 202         }
 203         ms_error("Enabling codec not in audio or video list of PayloadType !");
 204         return -1;
 205 }
 206
 207 int linphone_core_get_payload_type_number(LinphoneCore *lc, const PayloadType *pt){
 208        return payload_type_get_number(pt);
 209 }
 210
 211 const char *linphone_core_get_payload_type_description(LinphoneCore *lc, PayloadType *pt){
 212         if (ms_filter_codec_supported(pt->mime_type)){
 213                 MSFilterDesc *desc=ms_filter_get_encoder(pt->mime_type);
 214 #ifdef ENABLE_NLS
 215                 return dgettext("mediastreamer",desc->text);
 216 #else
 217                 return desc->text;
 218 #endif
 219         }
 220         return NULL;
 221 }
 222
 223
 224 /*this function makes a special case for speex/8000.
 225 This codec is variable bitrate. The 8kbit/s mode is interesting when having a low upload bandwidth, but its quality
 226 is not very good. We 'd better use its 15kbt/s mode when we have enough bandwidth*/
 227 static int get_codec_bitrate(LinphoneCore *lc, const PayloadType *pt){
 228         int upload_bw=linphone_core_get_upload_bandwidth(lc);
 229         if (bandwidth_is_greater(upload_bw,129) || (bandwidth_is_greater(upload_bw,33) && !linphone_core_video_enabled(lc)) ) {
 230                 if (strcmp(pt->mime_type,"speex")==0 && pt->clock_rate==8000){
 231                         return 15000;
 232                 }
 233         }
 234         return pt->normal_bitrate;
 235 }
 236
 237 static double get_audio_payload_bandwidth(LinphoneCore *lc, const PayloadType *pt){
 238         double npacket=50;
 239         double packet_size;
 240         int bitrate;
 241         bitrate=get_codec_bitrate(lc,pt);
 242         packet_size= (((double)bitrate)/(50*8))+UDP_HDR_SZ+RTP_HDR_SZ+IP4_HDR_SZ;
 243         return packet_size*8.0*npacket;
 244 }
 245
 246 void linphone_core_update_allocated_audio_bandwidth_in_call(LinphoneCall *call, const PayloadType *pt){
 247         call->audio_bw=(int)(get_audio_payload_bandwidth(call->core,pt)/1000.0);
 248         ms_message("Audio bandwidth for this call is %i",call->audio_bw);
 249 }
 250
 251 void linphone_core_update_allocated_audio_bandwidth(LinphoneCore *lc){
 252         const MSList *elem;
 253         PayloadType *max=NULL;
 254         for(elem=linphone_core_get_audio_codecs(lc);elem!=NULL;elem=elem->next){
 255                 PayloadType *pt=(PayloadType*)elem->data;
 256                 if (payload_type_enabled(pt)){
 257                         int pt_bitrate=get_codec_bitrate(lc,pt);
 258                         if (max==NULL) max=pt;
 259                         else if (max->normal_bitrate<pt_bitrate){
 260                                 max=pt;
 261                         }
 262                 }
 263         }
 264         if (max) {
 265                 lc->audio_bw=(int)(get_audio_payload_bandwidth(lc,max)/1000.0);
 266         }
 267 }
 268
 269 bool_t linphone_core_is_payload_type_usable_for_bandwidth(LinphoneCore *lc, PayloadType *pt,  int bandwidth_limit)
 270 {
 271         double codec_band;
 272         bool_t ret=FALSE;
 273
 274         switch (pt->type){
 275                 case PAYLOAD_AUDIO_CONTINUOUS:
 276                 case PAYLOAD_AUDIO_PACKETIZED:
 277                         codec_band=get_audio_payload_bandwidth(lc,pt);
 278                         ret=bandwidth_is_greater(bandwidth_limit*1000,codec_band);
 279                         /*hack to avoid using uwb codecs when having low bitrate and video*/
 280                         if (bandwidth_is_greater(199,bandwidth_limit)){
 281                                 if (linphone_core_video_enabled(lc) && pt->clock_rate>16000){
 282                                         ret=FALSE;
 283                                 }
 284                         }
 285                         //ms_message("Payload %s: %g",pt->mime_type,codec_band);
 286                         break;
 287                 case PAYLOAD_VIDEO:
 288                         if (bandwidth_limit!=0) {/* infinite (-1) or strictly positive*/
 289                                 ret=TRUE;
 290                         }
 291                         else ret=FALSE;
 292                         break;
 293         }
 294         return ret;
 295 }
 296
 297 /* return TRUE if codec can be used with bandwidth, FALSE else*/
 298 bool_t linphone_core_check_payload_type_usability(LinphoneCore *lc, PayloadType *pt)
 299 {
 300         double codec_band;
 301         int allowed_bw,video_bw;
 302         bool_t ret=FALSE;
 303
 304         linphone_core_update_allocated_audio_bandwidth(lc);
 305         allowed_bw=get_min_bandwidth(linphone_core_get_download_bandwidth(lc),
 306                                         linphone_core_get_upload_bandwidth(lc));
 307         if (allowed_bw==0) {
 308                 allowed_bw=-1;
 309                 video_bw=1500; /*around 1.5 Mbit/s*/
 310         }else
 311                 video_bw=get_video_bandwidth(allowed_bw,lc->audio_bw);
 312
 313         switch (pt->type){
 314                 case PAYLOAD_AUDIO_CONTINUOUS:
 315                 case PAYLOAD_AUDIO_PACKETIZED:
 316                         codec_band=get_audio_payload_bandwidth(lc,pt);
 317                         ret=bandwidth_is_greater(allowed_bw*1000,codec_band);
 318                         /*hack to avoid using uwb codecs when having low bitrate and video*/
 319                         if (bandwidth_is_greater(199,allowed_bw)){
 320                                 if (linphone_core_video_enabled(lc) && pt->clock_rate>16000){
 321                                         ret=FALSE;
 322                                 }
 323                         }
 324                         //ms_message("Payload %s: %g",pt->mime_type,codec_band);
 325                         break;
 326                 case PAYLOAD_VIDEO:
 327                         if (video_bw>0){
 328                                 pt->normal_bitrate=video_bw*1000;
 329                                 ret=TRUE;
 330                         }
 331                         else ret=FALSE;
 332                         break;
 333         }
 334         return ret;
 335 }
 336
 337 bool_t lp_spawn_command_line_sync(const char *command, char **result,int *command_ret){
 338 #if !defined(_WIN32_WCE)
 339         FILE *f=popen(command,"r");
 340         if (f!=NULL){
 341                 int err;
 342                 *result=ms_malloc(4096);
 343                 err=fread(*result,1,4096-1,f);
 344                 if (err<0){
 345                         ms_warning("Error reading command output:%s",strerror(errno));
 346                         ms_free(result);
 347                         return FALSE;
 348                 }
 349                 (*result)[err]=0;
 350                 err=pclose(f);
 351                 if (command_ret!=NULL) *command_ret=err;
 352                 return TRUE;
 353         }
 354 #endif /*_WIN32_WCE*/
 355         return FALSE;
 356 }
 357
 358 static ortp_socket_t create_socket(int local_port){
 359         struct sockaddr_in laddr;
 360         ortp_socket_t sock;
 361         int optval;
 362         sock=socket(PF_INET,SOCK_DGRAM,IPPROTO_UDP);
 363         if (sock<0) {
 364                 ms_error("Fail to create socket");
 365                 return -1;
 366         }
 367         memset (&laddr,0,sizeof(laddr));
 368         laddr.sin_family=AF_INET;
 369         laddr.sin_addr.s_addr=INADDR_ANY;
 370         laddr.sin_port=htons(local_port);
 371         if (bind(sock,(struct sockaddr*)&laddr,sizeof(laddr))<0){
 372                 ms_error("Bind socket to 0.0.0.0:%i failed: %s",local_port,getSocketError());
 373                 close_socket(sock);
 374                 return -1;
 375         }
 376         optval=1;
 377         if (setsockopt (sock, SOL_SOCKET, SO_REUSEADDR,
 378                                 (SOCKET_OPTION_VALUE)&optval, sizeof (optval))<0){
 379                 ms_warning("Fail to set SO_REUSEADDR");
 380         }
 381         set_non_blocking_socket(sock);
 382         return sock;
 383 }
 384
 385 static int sendStunRequest(int sock, const struct sockaddr *server, socklen_t addrlen, int id, bool_t changeAddr){
 386         char buf[STUN_MAX_MESSAGE_SIZE];
 387         int len = STUN_MAX_MESSAGE_SIZE;
 388         StunAtrString username;
 389         StunAtrString password;
 390         StunMessage req;
 391         int err;
 392         memset(&req, 0, sizeof(StunMessage));
 393         memset(&username,0,sizeof(username));
 394         memset(&password,0,sizeof(password));
 395         stunBuildReqSimple( &req, &username, changeAddr , changeAddr , id);
 396         len = stunEncodeMessage( &req, buf, len, &password);
 397         if (len<=0){
 398                 ms_error("Fail to encode stun message.");
 399                 return -1;
 400         }
 401         err=sendto(sock,buf,len,0,server,addrlen);
 402         if (err<0){
 403                 ms_error("sendto failed: %s",strerror(errno));
 404                 return -1;
 405         }
 406         return 0;
 407 }
 408
 409 int parse_hostname_to_addr(const char *server, struct sockaddr_storage *ss, socklen_t *socklen){
 410         struct addrinfo hints,*res=NULL;
 411         int family = PF_INET;
 412         int port_int = 3478;
 413         int ret;
 414         char port[6];
 415         char host[NI_MAXHOST];
 416         char *p1, *p2;
 417         if ((sscanf(server, "[%64[^]]]:%d", host, &port_int) == 2) || (sscanf(server, "[%64[^]]]", host) == 1)) {
 418                 family = PF_INET6;
 419         } else {
 420                 p1 = strchr(server, ':');
 421                 p2 = strrchr(server, ':');
 422                 if (p1 && p2 && (p1 != p2)) {
 423                         family = PF_INET6;
 424                         host[NI_MAXHOST-1]='\0';
 425                         strncpy(host, server, sizeof(host) - 1);
 426                 } else if (sscanf(server, "%[^:]:%d", host, &port_int) != 2) {
 427                         host[NI_MAXHOST-1]='\0';
 428                         strncpy(host, server, sizeof(host) - 1);
 429                 }
 430         }
 431         snprintf(port, sizeof(port), "%d", port_int);
 432         memset(&hints,0,sizeof(hints));
 433         hints.ai_family=family;
 434         hints.ai_socktype=SOCK_DGRAM;
 435         hints.ai_protocol=IPPROTO_UDP;
 436         ret=getaddrinfo(host,port,&hints,&res);
 437         if (ret!=0){
 438                 ms_error("getaddrinfo() failed for %s:%s : %s",host,port,gai_strerror(ret));
 439                 return -1;
 440         }
 441         if (!res) return -1;
 442         memcpy(ss,res->ai_addr,res->ai_addrlen);
 443         *socklen=res->ai_addrlen;
 444         freeaddrinfo(res);
 445         return 0;
 446 }
 447
 448 static int recvStunResponse(ortp_socket_t sock, char *ipaddr, int *port, int *id){
 449         char buf[STUN_MAX_MESSAGE_SIZE];
 450         int len = STUN_MAX_MESSAGE_SIZE;
 451         StunMessage resp;
 452         len=recv(sock,buf,len,0);
 453         if (len>0){
 454                 struct in_addr ia;
 455                 stunParseMessage(buf,len, &resp );
 456                 *id=resp.msgHdr.tr_id.octet[0];
 457                 if (resp.hasXorMappedAddress){
 458                         *port = resp.xorMappedAddress.ipv4.port;
 459                         ia.s_addr=htonl(resp.xorMappedAddress.ipv4.addr);
 460                 }else if (resp.hasMappedAddress){
 461                         *port = resp.mappedAddress.ipv4.port;
 462                         ia.s_addr=htonl(resp.mappedAddress.ipv4.addr);
 463                 }else return -1;
 464                 strncpy(ipaddr,inet_ntoa(ia),LINPHONE_IPADDR_SIZE);
 465         }
 466         return len;
 467 }
 468
 469 void linphone_core_run_stun_tests(LinphoneCore *lc, LinphoneCall *call){
 470         const char *server=linphone_core_get_stun_server(lc);
 471
 472         if (lc->sip_conf.ipv6_enabled){
 473                 ms_warning("stun support is not implemented for ipv6");
 474                 return;
 475         }
 476         if (server!=NULL){
 477                 struct sockaddr_storage ss;
 478                 socklen_t ss_len;
 479                 ortp_socket_t sock1=-1, sock2=-1;
 480                 int loops=0;
 481                 bool_t video_enabled=linphone_core_video_enabled(lc);
 482                 bool_t got_audio,got_video;
 483                 bool_t cone_audio=FALSE,cone_video=FALSE;
 484                 struct timeval init,cur;
 485                 SalEndpointCandidate *ac,*vc;
 486
 487                 ac=&call->localdesc->streams[0].candidates[0];
 488                 vc=&call->localdesc->streams[1].candidates[0];
 489
 490                 if (parse_hostname_to_addr(server,&ss,&ss_len)<0){
 491                         ms_error("Fail to parser stun server address: %s",server);
 492                         return;
 493                 }
 494                 if (lc->vtable.display_status!=NULL)
 495                         lc->vtable.display_status(lc,_("Stun lookup in progress..."));
 496
 497                 /*create the two audio and video RTP sockets, and send STUN message to our stun server */
 498                 sock1=create_socket(call->audio_port);
 499                 if (sock1==-1) return;
 500                 if (video_enabled){
 501                         sock2=create_socket(call->video_port);
 502                         if (sock2==-1) return ;
 503                 }
 504                 got_audio=FALSE;
 505                 got_video=FALSE;
 506                 gettimeofday(&init,NULL);
 507                 do{
 508                         double elapsed;
 509                         int id;
 510                         if (loops%20==0){
 511                                 ms_message("Sending stun requests...");
 512                                 sendStunRequest(sock1,(struct sockaddr*)&ss,ss_len,11,TRUE);
 513                                 sendStunRequest(sock1,(struct sockaddr*)&ss,ss_len,1,FALSE);
 514                                 if (sock2!=-1){
 515                                         sendStunRequest(sock2,(struct sockaddr*)&ss,ss_len,22,TRUE);
 516                                         sendStunRequest(sock2,(struct sockaddr*)&ss,ss_len,2,FALSE);
 517                                 }
 518                         }
 519 #ifdef WIN32
 520                         Sleep(10);
 521 #else
 522                         usleep(10000);
 523 #endif
 524
 525                         if (recvStunResponse(sock1,ac->addr,
 526                                                 &ac->port,&id)>0){
 527                                 ms_message("STUN test result: local audio port maps to %s:%i",
 528                                                 ac->addr,
 529                                                 ac->port);
 530                                 if (id==11)
 531                                         cone_audio=TRUE;
 532                                 got_audio=TRUE;
 533                         }
 534                         if (recvStunResponse(sock2,vc->addr,
 535                                                         &vc->port,&id)>0){
 536                                 ms_message("STUN test result: local video port maps to %s:%i",
 537                                         vc->addr,
 538                                         vc->port);
 539                                 if (id==22)
 540                                         cone_video=TRUE;
 541                                 got_video=TRUE;
 542                         }
 543                         gettimeofday(&cur,NULL);
 544                         elapsed=((cur.tv_sec-init.tv_sec)*1000.0) +  ((cur.tv_usec-init.tv_usec)/1000.0);
 545                         if (elapsed>2000)  {
 546                                 ms_message("Stun responses timeout, going ahead.");
 547                                 break;
 548                         }
 549                         loops++;
 550                 }while(!(got_audio && (got_video||sock2==-1)  ) );
 551                 if (!got_audio){
 552                         ms_error("No stun server response for audio port.");
 553                 }else{
 554                         if (!cone_audio) {
 555                                 ms_message("NAT is symmetric for audio port");
 556                         }
 557                 }
 558                 if (sock2!=-1){
 559                         if (!got_video){
 560                                 ms_error("No stun server response for video port.");
 561                         }else{
 562                                 if (!cone_video) {
 563                                         ms_message("NAT is symmetric for video port.");
 564                                 }
 565                         }
 566                 }
 567                 if ((ac->addr[0]!='\0' && vc->addr[0]!='\0' && strcmp(ac->addr,vc->addr)==0)
 568                     || sock2==-1){
 569                         strcpy(call->localdesc->addr,ac->addr);
 570                 }
 571                 close_socket(sock1);
 572                 if (sock2!=-1) close_socket(sock2);
 573         }
 574 }
 575
 576 int linphone_core_gather_ice_candidates(LinphoneCore *lc, LinphoneCall *call)
 577 {
 578         char local_addr[64];
 579         struct sockaddr_storage ss;
 580         socklen_t ss_len;
 581         IceCheckList *audio_check_list;
 582         IceCheckList *video_check_list;
 583         const char *server = linphone_core_get_stun_server(lc);
 584
 585         if ((server == NULL) || (call->ice_session == NULL)) return -1;
 586         audio_check_list = ice_session_check_list(call->ice_session, 0);
 587         video_check_list = ice_session_check_list(call->ice_session, 1);
 588         if (audio_check_list == NULL) return -1;
 589
 590         if (lc->sip_conf.ipv6_enabled){
 591                 ms_warning("stun support is not implemented for ipv6");
 592                 return -1;
 593         }
 594
 595         if (parse_hostname_to_addr(server, &ss, &ss_len) < 0) {
 596                 ms_error("Fail to parser stun server address: %s", server);
 597                 return -1;
 598         }
 599         if (lc->vtable.display_status != NULL)
 600                 lc->vtable.display_status(lc, _("ICE local candidates gathering in progress..."));
 601
 602         /* Gather local host candidates. */
 603         if (linphone_core_get_local_ip_for(AF_INET, NULL, local_addr) < 0) {
 604                 ms_error("Fail to get local ip");
 605                 return -1;
 606         }
 607         ice_add_local_candidate(audio_check_list, "host", local_addr, call->audio_port, 1, NULL);
 608         ice_add_local_candidate(audio_check_list, "host", local_addr, call->audio_port + 1, 2, NULL);
 609         if (call->params.has_video && (video_check_list != NULL)) {
 610                 ice_add_local_candidate(video_check_list, "host", local_addr, call->video_port, 1, NULL);
 611                 ice_add_local_candidate(video_check_list, "host", local_addr, call->video_port + 1, 2, NULL);
 612         }
 613
 614         ms_message("ICE: gathering candidate from [%s]",server);
 615         /* Gather local srflx candidates. */
 616         ice_session_gather_candidates(call->ice_session, ss, ss_len);
 617         return 0;
 618 }
 619
 620 void linphone_core_update_local_media_description_from_ice(SalMediaDescription *desc, IceSession *session)
 621 {
 622         const char *rtp_addr, *rtcp_addr;
 623         IceSessionState session_state = ice_session_state(session);
 624         int nb_candidates;
 625         int i, j;
 626         bool_t result;
 627
 628         if (session_state == IS_Completed) {
 629                 desc->ice_completed = TRUE;
 630                 ice_check_list_selected_valid_local_candidate(ice_session_check_list(session, 0), &rtp_addr, NULL, NULL, NULL);
 631                 strncpy(desc->addr, rtp_addr, sizeof(desc->addr));
 632         }
 633         else {
 634                 desc->ice_completed = FALSE;
 635         }
 636         strncpy(desc->ice_pwd, ice_session_local_pwd(session), sizeof(desc->ice_pwd));
 637         strncpy(desc->ice_ufrag, ice_session_local_ufrag(session), sizeof(desc->ice_ufrag));
 638         for (i = 0; i < desc->nstreams; i++) {
 639                 SalStreamDescription *stream = &desc->streams[i];
 640                 IceCheckList *cl = ice_session_check_list(session, i);
 641                 nb_candidates = 0;
 642                 if (cl == NULL) continue;
 643                 if (ice_check_list_state(cl) == ICL_Completed) {
 644                         stream->ice_completed = TRUE;
 645                         result = ice_check_list_selected_valid_local_candidate(ice_session_check_list(session, i), &rtp_addr, &stream->rtp_port, &rtcp_addr, &stream->rtcp_port);
 646                 } else {
 647                         stream->ice_completed = FALSE;
 648                         result = ice_check_list_default_local_candidate(ice_session_check_list(session, i), &rtp_addr, &stream->rtp_port, &rtcp_addr, &stream->rtcp_port);
 649                 }
 650                 if (result == TRUE) {
 651                         strncpy(stream->rtp_addr, rtp_addr, sizeof(stream->rtp_addr));
 652                         strncpy(stream->rtcp_addr, rtcp_addr, sizeof(stream->rtcp_addr));
 653                 } else {
 654                         memset(stream->rtp_addr, 0, sizeof(stream->rtp_addr));
 655                         memset(stream->rtcp_addr, 0, sizeof(stream->rtcp_addr));
 656                 }
 657                 if ((strlen(ice_check_list_local_pwd(cl)) != strlen(desc->ice_pwd)) || (strcmp(ice_check_list_local_pwd(cl), desc->ice_pwd)))
 658                         strncpy(stream->ice_pwd, ice_check_list_local_pwd(cl), sizeof(stream->ice_pwd));
 659                 else
 660                         memset(stream->ice_pwd, 0, sizeof(stream->ice_pwd));
 661                 if ((strlen(ice_check_list_local_ufrag(cl)) != strlen(desc->ice_ufrag)) || (strcmp(ice_check_list_local_ufrag(cl), desc->ice_ufrag)))
 662                         strncpy(stream->ice_ufrag, ice_check_list_local_ufrag(cl), sizeof(stream->ice_ufrag));
 663                 else
 664                         memset(stream->ice_pwd, 0, sizeof(stream->ice_pwd));
 665                 stream->ice_mismatch = ice_check_list_is_mismatch(cl);
 666                 if ((ice_check_list_state(cl) == ICL_Running) || (ice_check_list_state(cl) == ICL_Completed)) {
 667                         memset(stream->ice_candidates, 0, sizeof(stream->ice_candidates));
 668                         for (j = 0; j < MIN(ms_list_size(cl->local_candidates), SAL_MEDIA_DESCRIPTION_MAX_ICE_CANDIDATES); j++) {
 669                                 SalIceCandidate *sal_candidate = &stream->ice_candidates[nb_candidates];
 670                                 IceCandidate *ice_candidate = ms_list_nth_data(cl->local_candidates, j);
 671                                 const char *default_addr = NULL;
 672                                 int default_port = 0;
 673                                 if (ice_candidate->componentID == 1) {
 674                                         default_addr = stream->rtp_addr;
 675                                         default_port = stream->rtp_port;
 676                                 } else if (ice_candidate->componentID == 2) {
 677                                         default_addr = stream->rtcp_addr;
 678                                         default_port = stream->rtcp_port;
 679                                 } else continue;
 680                                 if (default_addr[0] == '\0') default_addr = desc->addr;
 681                                 /* Only include the candidates matching the default destination for each component of the stream if the state is Completed as specified in RFC5245 section 9.1.2.2. */
 682                                 if ((ice_check_list_state(cl) == ICL_Completed)
 683                                         && !((ice_candidate->taddr.port == default_port) && (strlen(ice_candidate->taddr.ip) == strlen(default_addr)) && (strcmp(ice_candidate->taddr.ip, default_addr) == 0)))
 684                                         continue;
 685                                 strncpy(sal_candidate->foundation, ice_candidate->foundation, sizeof(sal_candidate->foundation));
 686                                 sal_candidate->componentID = ice_candidate->componentID;
 687                                 sal_candidate->priority = ice_candidate->priority;
 688                                 strncpy(sal_candidate->type, ice_candidate_type(ice_candidate), sizeof(sal_candidate->type));
 689                                 strncpy(sal_candidate->addr, ice_candidate->taddr.ip, sizeof(sal_candidate->addr));
 690                                 sal_candidate->port = ice_candidate->taddr.port;
 691                                 if ((ice_candidate->base != NULL) && (ice_candidate->base != ice_candidate)) {
 692                                         strncpy(sal_candidate->raddr, ice_candidate->base->taddr.ip, sizeof(sal_candidate->raddr));
 693                                         sal_candidate->rport = ice_candidate->base->taddr.port;
 694                                 }
 695                                 nb_candidates++;
 696                         }
 697                 }
 698                 if ((ice_check_list_state(cl) == ICL_Completed) && (ice_session_role(session) == IR_Controlling)) {
 699                         int rtp_port, rtcp_port;
 700                         memset(stream->ice_remote_candidates, 0, sizeof(stream->ice_remote_candidates));
 701                         ice_check_list_selected_valid_remote_candidate(cl, &rtp_addr, &rtp_port, &rtcp_addr, &rtcp_port);
 702                         strncpy(stream->ice_remote_candidates[0].addr, rtp_addr, sizeof(stream->ice_remote_candidates[0].addr));
 703                         stream->ice_remote_candidates[0].port = rtp_port;
 704                         strncpy(stream->ice_remote_candidates[1].addr, rtcp_addr, sizeof(stream->ice_remote_candidates[1].addr));
 705                         stream->ice_remote_candidates[1].port = rtcp_port;
 706                 }
 707         }
 708 }
 709
 710 static void get_default_addr_and_port(uint16_t componentID, const SalMediaDescription *md, const SalStreamDescription *stream, const char **addr, int *port)
 711 {
 712         if (componentID == 1) {
 713                 *addr = stream->rtp_addr;
 714                 *port = stream->rtp_port;
 715         } else if (componentID == 2) {
 716                 *addr = stream->rtcp_addr;
 717                 *port = stream->rtcp_port;
 718         } else return;
 719         if ((*addr)[0] == '\0') *addr = md->addr;
 720 }
 721
 722 void linphone_core_update_ice_from_remote_media_description(LinphoneCall *call, const SalMediaDescription *md)
 723 {
 724         bool_t ice_restarted = FALSE;
 725
 726         if ((md->ice_pwd[0] != '\0') && (md->ice_ufrag[0] != '\0')) {
 727                 int i, j;
 728
 729                 /* Check for ICE restart and set remote credentials. */
 730                 if ((strcmp(md->addr, "0.0.0.0") == 0) || (strcmp(md->addr, "::0") == 0)) {
 731                         ice_session_restart(call->ice_session);
 732                         ice_restarted = TRUE;
 733                 } else {
 734                         for (i = 0; i < md->nstreams; i++) {
 735                                 const SalStreamDescription *stream = &md->streams[i];
 736                                 IceCheckList *cl = ice_session_check_list(call->ice_session, i);
 737                                 if (cl && (strcmp(stream->rtp_addr, "0.0.0.0") == 0)) {
 738                                         ice_session_restart(call->ice_session);
 739                                         ice_restarted = TRUE;
 740                                         break;
 741                                 }
 742                         }
 743                 }
 744                 if ((ice_session_remote_ufrag(call->ice_session) == NULL) && (ice_session_remote_pwd(call->ice_session) == NULL)) {
 745                         ice_session_set_remote_credentials(call->ice_session, md->ice_ufrag, md->ice_pwd);
 746                 } else if (ice_session_remote_credentials_changed(call->ice_session, md->ice_ufrag, md->ice_pwd)) {
 747                         if (ice_restarted == FALSE) {
 748                                 ice_session_restart(call->ice_session);
 749                                 ice_restarted = TRUE;
 750                         }
 751                         ice_session_set_remote_credentials(call->ice_session, md->ice_ufrag, md->ice_pwd);
 752                 }
 753                 for (i = 0; i < md->nstreams; i++) {
 754                         const SalStreamDescription *stream = &md->streams[i];
 755                         IceCheckList *cl = ice_session_check_list(call->ice_session, i);
 756                         if (cl && (stream->ice_pwd[0] != '\0') && (stream->ice_ufrag[0] != '\0')) {
 757                                 if (ice_check_list_remote_credentials_changed(cl, stream->ice_ufrag, stream->ice_pwd)) {
 758                                         if (ice_restarted == FALSE) {
 759                                                 ice_session_restart(call->ice_session);
 760                                                 ice_restarted = TRUE;
 761                                         }
 762                                         ice_session_set_remote_credentials(call->ice_session, md->ice_ufrag, md->ice_pwd);
 763                                         break;
 764                                 }
 765                         }
 766                 }
 767
 768                 /* Create ICE check lists if needed and parse ICE attributes. */
 769                 for (i = 0; i < md->nstreams; i++) {
 770                         const SalStreamDescription *stream = &md->streams[i];
 771                         IceCheckList *cl = ice_session_check_list(call->ice_session, i);
 772                         if (cl == NULL) {
 773                                 cl = ice_check_list_new();
 774                                 ice_session_add_check_list(call->ice_session, cl);
 775                                 switch (stream->type) {
 776                                         case SalAudio:
 777                                                 if (call->audiostream != NULL) call->audiostream->ice_check_list = cl;
 778                                                 break;
 779                                         case SalVideo:
 780                                                 if (call->videostream != NULL) call->videostream->ice_check_list = cl;
 781                                                 break;
 782                                         default:
 783                                                 break;
 784                                 }
 785                         }
 786                         if ((stream->ice_mismatch == TRUE) || (stream->rtp_port == 0)) {
 787                                 ice_check_list_set_state(cl, ICL_Failed);
 788                         } else {
 789                                 if ((stream->ice_pwd[0] != '\0') && (stream->ice_ufrag[0] != '\0'))
 790                                         ice_check_list_set_remote_credentials(cl, stream->ice_ufrag, stream->ice_pwd);
 791                                 for (j = 0; j < SAL_MEDIA_DESCRIPTION_MAX_ICE_CANDIDATES; j++) {
 792                                         const SalIceCandidate *candidate = &stream->ice_candidates[j];
 793                                         bool_t default_candidate = FALSE;
 794                                         const char *addr = NULL;
 795                                         int port = 0;
 796                                         if (candidate->addr[0] == '\0') break;
 797                                         if ((candidate->componentID == 0) || (candidate->componentID > 2)) continue;
 798                                         get_default_addr_and_port(candidate->componentID, md, stream, &addr, &port);
 799                                         if (addr && (candidate->port == port) && (strlen(candidate->addr) == strlen(addr)) && (strcmp(candidate->addr, addr) == 0))
 800                                                 default_candidate = TRUE;
 801                                         ice_add_remote_candidate(cl, candidate->type, candidate->addr, candidate->port, candidate->componentID,
 802                                                 candidate->priority, candidate->foundation, default_candidate);
 803                                 }
 804                                 if (ice_restarted == FALSE) {
 805                                         bool_t losing_pairs_added = FALSE;
 806                                         for (j = 0; j < SAL_MEDIA_DESCRIPTION_MAX_ICE_REMOTE_CANDIDATES; j++) {
 807                                                 const SalIceRemoteCandidate *candidate = &stream->ice_remote_candidates[j];
 808                                                 const char *addr = NULL;
 809                                                 int port = 0;
 810                                                 int componentID = j + 1;
 811                                                 if (candidate->addr[0] == '\0') break;
 812                                                 get_default_addr_and_port(componentID, md, stream, &addr, &port);
 813                                                 ice_add_losing_pair(cl, j + 1, candidate->addr, candidate->port, addr, port);
 814                                                 losing_pairs_added = TRUE;
 815                                         }
 816                                         if (losing_pairs_added == TRUE) ice_check_list_check_completed(cl);
 817                                 }
 818                         }
 819                 }
 820                 for (i = ice_session_nb_check_lists(call->ice_session); i > md->nstreams; i--) {
 821                         ice_session_remove_check_list(call->ice_session, ice_session_check_list(call->ice_session, i - 1));
 822                 }
 823                 ice_session_check_mismatch(call->ice_session);
 824         }
 825         if (ice_session_nb_check_lists(call->ice_session) == 0) {
 826                 linphone_call_delete_ice_session(call);
 827         }
 828 }
 829
 830 void linphone_core_deactivate_ice_for_deactivated_media_streams(LinphoneCall *call, const SalMediaDescription *md)
 831 {
 832         int i;
 833         for (i = 0; i < md->nstreams; i++) {
 834                 IceCheckList *cl = ice_session_check_list(call->ice_session, i);
 835                 if (cl && (md->streams[i].rtp_port == 0)) {
 836                         if (ice_check_list_state(cl) != ICL_Completed) ice_check_list_set_state(cl, ICL_Failed);
 837                 }
 838         }
 839 }
 840
 841 LinphoneCall * is_a_linphone_call(void *user_pointer){
 842         LinphoneCall *call=(LinphoneCall*)user_pointer;
 843         if (call==NULL) return NULL;
 844         return call->magic==linphone_call_magic ? call : NULL;
 845 }
 846
 847 LinphoneProxyConfig * is_a_linphone_proxy_config(void *user_pointer){
 848         LinphoneProxyConfig *cfg=(LinphoneProxyConfig*)user_pointer;
 849         if (cfg==NULL) return NULL;
 850         return cfg->magic==linphone_proxy_config_magic ? cfg : NULL;
 851 }
 852
 853 unsigned int linphone_core_get_audio_features(LinphoneCore *lc){
 854         unsigned int ret=0;
 855         const char *features=lp_config_get_string(lc->config,"sound","features",NULL);
 856         if (features){
 857                 char tmp[256]={0};
 858                 char name[256];
 859                 char *p,*n;
 860                 strncpy(tmp,features,sizeof(tmp)-1);
 861                 for(p=tmp;*p!='\0';p++){
 862                         if (*p==' ') continue;
 863                         n=strchr(p,'|');
 864                         if (n) *n='\0';
 865                         sscanf(p,"%s",name);
 866                         ms_message("Found audio feature %s",name);
 867                         if (strcasecmp(name,"PLC")==0) ret|=AUDIO_STREAM_FEATURE_PLC;
 868                         else if (strcasecmp(name,"EC")==0) ret|=AUDIO_STREAM_FEATURE_EC;
 869                         else if (strcasecmp(name,"EQUALIZER")==0) ret|=AUDIO_STREAM_FEATURE_EQUALIZER;
 870                         else if (strcasecmp(name,"VOL_SND")==0) ret|=AUDIO_STREAM_FEATURE_VOL_SND;
 871                         else if (strcasecmp(name,"VOL_RCV")==0) ret|=AUDIO_STREAM_FEATURE_VOL_RCV;
 872                         else if (strcasecmp(name,"DTMF")==0) ret|=AUDIO_STREAM_FEATURE_DTMF;
 873                         else if (strcasecmp(name,"DTMF_ECHO")==0) ret|=AUDIO_STREAM_FEATURE_DTMF_ECHO;
 874                         else if (strcasecmp(name,"ALL")==0) ret|=AUDIO_STREAM_FEATURE_ALL;
 875                         else if (strcasecmp(name,"NONE")==0) ret=0;
 876                         else ms_error("Unsupported audio feature %s requested in config file.",name);
 877                         if (!n) break;
 878                         p=n;
 879                 }
 880         }else ret=AUDIO_STREAM_FEATURE_ALL;
 881         return ret;
 882 }
 883
 884
 885 #ifdef HAVE_GETIFADDRS
 886
 887 #include <ifaddrs.h>
 888 static int get_local_ip_with_getifaddrs(int type, char *address, int size)
 889 {
 890         struct ifaddrs *ifp;
 891         struct ifaddrs *ifpstart;
 892         int ret = 0;
 893
 894         if (getifaddrs(&ifpstart) < 0) {
 895                 return -1;
 896         }
 897
 898         for (ifp = ifpstart; ifp != NULL; ifp = ifp->ifa_next) {
 899                 if (ifp->ifa_addr && ifp->ifa_addr->sa_family == type
 900                         && (ifp->ifa_flags & IFF_RUNNING) && !(ifp->ifa_flags & IFF_LOOPBACK))
 901                 {
 902                         getnameinfo(ifp->ifa_addr,
 903                                                 (type == AF_INET6) ?
 904                                                 sizeof(struct sockaddr_in6) : sizeof(struct sockaddr_in),
 905                                                 address, size, NULL, 0, NI_NUMERICHOST);
 906                         if (strchr(address, '%') == NULL) {     /*avoid ipv6 link-local addresses */
 907                                 /*ms_message("getifaddrs() found %s",address);*/
 908                                 ret++;
 909                                 break;
 910                         }
 911                 }
 912         }
 913         freeifaddrs(ifpstart);
 914         return ret;
 915 }
 916 #endif
 917
 918
 919 static int get_local_ip_for_with_connect(int type, const char *dest, char *result){
 920         int err,tmp;
 921         struct addrinfo hints;
 922         struct addrinfo *res=NULL;
 923         struct sockaddr_storage addr;
 924         struct sockaddr *p_addr=(struct sockaddr*)&addr;
 925         ortp_socket_t sock;
 926         socklen_t s;
 927
 928         memset(&hints,0,sizeof(hints));
 929         hints.ai_family=(type==AF_INET6) ? PF_INET6 : PF_INET;
 930         hints.ai_socktype=SOCK_DGRAM;
 931         /*hints.ai_flags=AI_NUMERICHOST|AI_CANONNAME;*/
 932         err=getaddrinfo(dest,"5060",&hints,&res);
 933         if (err!=0){
 934                 ms_error("getaddrinfo() error: %s",gai_strerror(err));
 935                 return -1;
 936         }
 937         if (res==NULL){
 938                 ms_error("bug: getaddrinfo returned nothing.");
 939                 return -1;
 940         }
 941         sock=socket(res->ai_family,SOCK_DGRAM,0);
 942         tmp=1;
 943         err=setsockopt(sock,SOL_SOCKET,SO_REUSEADDR,(SOCKET_OPTION_VALUE)&tmp,sizeof(int));
 944         if (err<0){
 945                 ms_warning("Error in setsockopt: %s",strerror(errno));
 946         }
 947         err=connect(sock,res->ai_addr,res->ai_addrlen);
 948         if (err<0) {
 949                 ms_error("Error in connect: %s",strerror(errno));
 950                 freeaddrinfo(res);
 951                 close_socket(sock);
 952                 return -1;
 953         }
 954         freeaddrinfo(res);
 955         res=NULL;
 956         s=sizeof(addr);
 957         err=getsockname(sock,(struct sockaddr*)&addr,&s);
 958         if (err!=0) {
 959                 ms_error("Error in getsockname: %s",strerror(errno));
 960                 close_socket(sock);
 961                 return -1;
 962         }
 963         if (p_addr->sa_family==AF_INET){
 964                 struct sockaddr_in *p_sin=(struct sockaddr_in*)p_addr;
 965                 if (p_sin->sin_addr.s_addr==0){
 966                         close_socket(sock);
 967                         return -1;
 968                 }
 969         }
 970         err=getnameinfo((struct sockaddr *)&addr,s,result,LINPHONE_IPADDR_SIZE,NULL,0,NI_NUMERICHOST);
 971         if (err!=0){
 972                 ms_error("getnameinfo error: %s",strerror(errno));
 973         }
 974         close_socket(sock);
 975         ms_message("Local interface to reach %s is %s.",dest,result);
 976         return 0;
 977 }
 978
 979 int linphone_core_get_local_ip_for(int type, const char *dest, char *result){
 980         strcpy(result,type==AF_INET ? "127.0.0.1" : "::1");
 981 #ifdef HAVE_GETIFADDRS
 982         if (dest==NULL) {
 983                 /*we use getifaddrs for lookup of default interface */
 984                 int found_ifs;
 985
 986                 found_ifs=get_local_ip_with_getifaddrs(type,result,LINPHONE_IPADDR_SIZE);
 987                 if (found_ifs==1){
 988                         return 0;
 989                 }else if (found_ifs<=0){
 990                         /*absolutely no network on this machine */
 991                         return -1;
 992                 }
 993         }
 994 #endif
 995         /*else use connect to find the best local ip address */
 996         if (type==AF_INET)
 997                 dest="87.98.157.38"; /*a public IP address*/
 998         else dest="2a00:1450:8002::68";
 999         return get_local_ip_for_with_connect(type,dest,result);
1000 }
1001
1002 #ifndef WIN32
1003 #include <resolv.h>
1004
1005
1006
1007 void _linphone_core_configure_resolver(){
1008 /*bionic declares _res but does not define nor export it !!*/
1009 #ifdef ANDROID
1010         /*timeout and attempts are the same as retrans and retry, but are android specific names.*/
1011         setenv("RES_OPTIONS","timeout:2 attempts:2 retrans:2 retry:2",1);
1012 #else
1013         res_init();
1014         _res.retrans=2; /*retransmit every two seconds*/
1015         _res.retry=2; /*only two times per DNS server*/
1016 #endif
1017 }
1018
1019 #else
1020
1021 void _linphone_core_configure_resolver(){
1022 }
1023
1024 #endif